TerrainOverlay.h

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#include <list>

typedef enum
  {
    HeightOverrideAlways,
    HeightOverrideNever,
    HeightOverrideIfHigher,
    HeightOverrideIfLower
  } height_override_t;


class TerrainPatch
{
 protected:
  float *corners[3];
  float vectors[3][3];
  
 public:
  TerrainPatch(float *c0, float *c1, float *c2);
  bool detectHit(float x, float y);
  void getNormal(float *normal);
  float getHeight(float *point);
  bool getAll(float *point, float *normal, float *height);
  virtual void draw(void) = 0;

};

class TerrainOverlay
{
 public:
  class TerrainOverlay *next;
  bool drawn;

 protected:
  float *vertex_array;
  float *uv_array;
  int *index_array;
  int indices;
  unsigned int tex;
  std::list<TerrainPatch*> patch_list;
 
  height_override_t height_mode;
 
 public:
  TerrainOverlay(int vertex_count, float *vertices, int index_count,
           int *indices, float *uv1, float *uv2);
  virtual ~TerrainOverlay() {}
  height_override_t getHeightMode(void) {return height_mode;}
  void finalize(void);
  virtual bool draw(void);
};


class TerrainOverlayMultiTex: public TerrainOverlay
{
 public:
  float *uv_array2;
  unsigned int tex2;

  TerrainOverlayMultiTex(int vertex_count, float *vertices, int index_count,
                int *indices, float *uv1, float *uv2);
  virtual ~TerrainOverlayMultiTex() {}
  bool draw(void);
};

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